Elevator.



W. SHERREN & T. MASON.

ELEVATOR.

APPLIOATIOH FILED JUNE 5, 1908. 909,695. Patented Jan. 12, 1909. 2 SHEETS-SHEET 1.

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W. SHERREN & T. MASON.

ELEVATOR.

APPLICATION mum JUNE 5, 1908.

909,695, Patented Jan.12,1909.

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WILLIAM SHERREN AND THOMAS MASON, OF MARION, INDIANA, ASSIGNORS TO ALONZO DENIUS, OF MARION, INDIANA.

ELEVATOR.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed June 5, 1908. Serial No. 436,980.

thereby preventing the car from dropping to the bottom of the elevator shaft.

The object of the invention is to provide a simple, practical and effective safety device which will be automatic in its operation and which will insure safety to the occupants and contents of the elevator.

With the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists of the novel features of construction and the combination of parts hereinafterfully described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a side elevation with parts 1 broken away and in section of our invention applied to a freight elevator, the car being shown in its normal position in full lines and in the position it assumes when its suspending cable parts, in dotted lines; Fig. 2 is a vertical transverse section taken on the plane indicated by the line 22 in Fig. 1 showing the parts in their normal position; Fig. 3 is a detail section showing the position the suspending loop or clevis assumes when the cable parts; and Fig. 4 is a detail horizontal section taken on the plane indicated by the line 4 4= in Fig. 1.

While we have shown our invention applied to a freight elevator, it will be understood that it may be used upon a passenger elevator or one of any other form and construction.

In the drawings 1 denotes the car of the elevator which has two upright side members or bars 2 united by a top member or cross bar 3 and which is suspended by a cable 5 for movement in a guide frame having two upright side members 6. The latter are provided upon their opposing inner faces with guide tracks 7 engaged by guide plates 8 secured to the upright bars or members 2 of be automatically engaged by clutches 10 carried by the car when the latter begins to drop upon the parting of the cable 5. One

of the catches 10 is arranged upon each side of the car and they are in the form of levers pivoted intermediate their ends, as at 11, between bearings or hangers 12 formed by extending the inner ends of the uppermost guide plates 8, as clearly shown in Fig. 1. The outer ends of the levers 10 are curved outwardly and downwardly and terminate in angular feet 13 which form dogs to engage the teeth of the toothed track bars or racks 9. Said ends or dogs 13 are arranged to swing in vertical slots 14: formed in the upright bars or members 2 of the car, as clearly shown in Figs. 1 and 2. The inner ends of the catch levers 10 have reduced overlapping extremities 15 arranged beneath the top cross bar 3 of the car and held normally in contact with the same and with each other by a suspending loop or clevis 16 which surrounds the parts 3, 15 and has the cable 5 suitably connected to its upper end, as at 17.

The weight of the car retains the top cross bar 3 and the ends 15 of the catch levers in the lower portion of the suspending loop 16 but the instant the cable 5 breaks or parts the loop 16 will drop downwardly upon the bar 3 to release the inner ends 15 of the catch levers and allow their outer ends or foot pieces 13 to swing outwardly and engage the teeth of the racks 9 to prevent the car from dropping to the bottom of the elevator shaft. In order to insure the operation of the catch levers 10 when the cable parts we preferably provide upon their inner ends Weights 1 8 and leaf springs 18 may also be arranged upon the bar 3 and to bear against the levers 10, as clearly shown in Fig. 1. The weights 8 are provided upon each side of each lever and have lower offset ends secured to the levers by transverse bolts 19 and upper or body portions projecting upwardly and disposed upon opposite sides of the cross bar 3, as more clearly shown in Fig. 2.

In order to lock the catch levers in their actuated position and thereby prevent them from slipping and allowing the car to drop,

inwhich the full lines represent the parts of the elevator and safety device in normal position. When the car is in proper running order the catch levers 10 will be held re tracted, as shown in full lines, but the instant the cable 5 parts the loop or clevis 16 will drop and permit the weightslS to actuate the inner ends of the levers downwardly and throw their foot pieces or dogs 13 outwardly into enga ement with the teeth of the racks 9 to e ectively prevent further downward movement of the car. As the inner ends of the levers swing downwardly the awls 20 will lock them insuch sit-ion so t at the car cannot slip and wi be secured in the dotted line position shown in Fig. 1 until, the cable 5 is repaired and the pawls 20 manually lifted.

From the foregoing it will be noted that our invention is entirely automatic in operation and owing to its simplicity it may be roduced and applied to an elevator of any description at small expense and will be strong, durable, effective and reliable.

Having thus described our invention what we claim is:

1. In'an elevator, the combinationwith a guide frame, a suspending cable and a car suspended by the cable and having side bars and a connecting cross bar, of racks upon the guide frame, catch levers pivoted intermediate their ends upon the car and adapted to have their outer ends engage said racks,

the inner ends of said levers being weighted and, disposal in overlapping relation beneath saidcross bar of the car, said inner ends of the levers being also provided with ratchet teeth, pawls pivoted upon said cross bar and adapted to engage said ratchet teeth and a loop or clevis surrounding said cross bar and the overlapping inner ends of saidlevers and connected tosaid cable.

2. In an elevator,the combination with a guide frame, a suspending cable and a car sus nded by the cable and having side bars an a connecting cross bar, said side bars being formed with vertical slots, of T-shaped track bars upon the frame and having their inwardly projecting flanges notched to form racks, upper and lower pairs of guide plates secured to the side bars and engaged with said track bars, catch levers pivoted intermediate their ends between the upper pairs guide frame, a suspending cable and a car suspended by the cable and having side bars and a connecting cross bar, said side bars being provided with vertical slots, of T-shaped track bars upon said guide frame, said track bars having their inwardly projecting flanges notched to provide racks, guide plates arranged in pairs upon the side bars of the car and engaged with the track bars, catch levers pivoted intermediate their ends between the upper pairs of guide plates and having their outer ends projecting through the slots in the side bars of the car and adapted to engage said racks, the innerends of said levers being arranged in overlapping relation beneath the cross, bar of the car, and a loop or clevis attached to the cable and surrounding said cross bar and the overlapping inner ends of the levers.

4. Inan elevator, the combination with a guide frame, a suspending cable and a car suspended by the cable and having side bars and a connecting cross bar, said side bars being formed with vertical slots, of track bars arranged upon the. frame, upper and lower pairs of guide plates secured to the side bars and engaged with the track bars, catch levers pivoted intennediatetheir ends between the upper pairs of guide plates and having their outer ends projecting through the slots in the'side bars of the car and adapted to engage said track bars, the inner end of said levers being arranged in overlapping relation beneath the cross bar of the car, means for actuating the inner ends of said levers downwardly when the cable severs, ratchet teeth upon the inner ends of said levers, pawls pivoted upon the cross bar and engaged with said ratchet teeth, and a loop or clevis attached to the cable and surrounding the cross bar and the overlapping inner ends of the levers.

In testimony whereof We hereunto afiix our signatures in the presence of two witnesses.

WILLIAM SHERREN. THOMAS MASON.

Witnesses:

CHARLES C. KILE, ORLANooM. FLINN.

It is hereby certified that Letters Patent N 0. 909,695, granted January 12, 1909, upon the application of William Sherren and Thomas Mason, of Marion, Indiana, for

an improvement in Elevators, were erroneously issued to Alonzo Denius, as

Patent should have been issued to the inventors, William Sharron and Thomas Mason, and Alonzo Denius,

owner of the entire interest in said invention; whereas said Letters jointly, said Alonzo Denius being the assignee of one-third interest only in said patent, as shown by the record of assignments in this otfice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of February, A. D., 1909.

[SEAL] G. (J. BILLINGS,

Acting Commissioner of Patents. 

